buffer_search: Fix DeployReplace not working when buffer search is already deployed (#29066)

Closes #29000

When buffer search is already deployed:
1. If find dialog is enabled, change it to find-and-replace dialog and
focuses to it
2. If find-and-replace is enabled, focuses to it 

Release Notes:

- Fixed an issue where invoking `DeployReplace` while the Find dialog
was open did not switch to the Find & Replace dialog.
- Fixed an issue where invoking `DeployReplace` while the Find & Replace
dialog was already open did not focus it.

crates/search/src/buffer_search.rs

@@ -657,6 +657,16 @@ impl BufferSearchBar {
         registrar.register_handler(ForDeployed(|this, deploy, window, cx| {
             this.deploy(deploy, window, cx);
         }));
+        registrar.register_handler(ForDismissed(|this, deploy, window, cx| {
+            this.deploy(deploy, window, cx);
+        }));
+        registrar.register_handler(ForDeployed(|this, _: &DeployReplace, window, cx| {
+            if this.supported_options(cx).find_in_results {
+                cx.propagate();
+            } else {
+                this.deploy(&Deploy::replace(), window, cx);
+            }
+        }));
         registrar.register_handler(ForDismissed(|this, _: &DeployReplace, window, cx| {
             if this.supported_options(cx).find_in_results {
                 cx.propagate();
@@ -664,9 +674,6 @@ impl BufferSearchBar {
                 this.deploy(&Deploy::replace(), window, cx);
             }
         }));
-        registrar.register_handler(ForDismissed(|this, deploy, window, cx| {
-            this.deploy(deploy, window, cx);
-        }))
     }
 
     pub fn new(